GTN细观损伤模型在铝合金轧制裂边分析中的应用  

Application of GTN-micromechanical Damage Model in Analysis of Rolling Edge Crack Defects

作　　者：赵彦玲[1] 车春雨[2] 云子艳[1] 王弘博[1] 铉佳平[3] 张广洲[3] 

机构地区：[1]哈尔滨理工大学机械动力工程学院,黑龙江哈尔滨150080 [2]中航工业哈尔滨飞机工业集团有限责任公司工程技术部,黑龙江哈尔滨150066 [3]沈阳航天三菱汽车发动机制造有限公司,辽宁沈阳110179

出　　处：《哈尔滨理工大学学报》2014年第4期44-48,共5页Journal of Harbin University of Science and Technology

基　　金：黑龙江省自然科学基金(E201028);哈尔滨市科技创新人才研究专项基金(2011RFJGG010)

摘　　要：针对4004铝合金薄板在轧制过程中产生裂边的问题,基于GTN细观损伤模型,采用数值模拟技术对冷轧板成型过程进行模拟计算,分析板材边部区域的应力场及临界空洞体积分数的变化,研究了轧板产生轧制裂边缺陷与下压量的关系,并进行了实验验证.结果表明,GTN细观损伤模型适用于有限元分析轧制裂边的产生;4004铝合金累积道次在50%以上易产生轧制裂边加工缺陷;单道次下压率为10%的板材成型率高于15%单道次下压率.以上研究对理论分析轧制裂边缺陷及提高轧制板材质量具有重要意义.In this paper, to solve the problem of edge minum alloy sheet, based on the GTN-micromechanical crack produced from the cool rolling process of 4004 aludamage model, the numerical simulation technique has been used to simulate the modeling process of cold-rolled sheet. The variations of stress field and critical void volume fractions on the edge of sheet have been analyzed. Furthermore, the relationship between roiling crack defects and press amount on rolling plates have been explored, whose result has been verified. The result shows that the GTN-micromechanical damage model is suitable for the finite element method to analyze the generation of rolling crack edge. Besides, when the cumulative passes of 4004 aluminum alloy are over 50% , the manufacturing defect of rolling crack edge will be easily produced, and the molding rate of sheets with the single pass press rate at 10% is higher than that at 15%. The above studies have important significance in the research of the rolling edge crack defects and the improvement of sheet quality.

关 键 词：GTN细观损伤模型 数值模拟 裂边 孔洞体积分数 

分 类 号：TB331[一般工业技术—材料科学与工程]